Pulsafeeder Pulsar Shadow - Manual (Page 22)

6. Startup
6.1 Output Adjustment
Figure 13
PULSAR Shadow
® pumps have a handwheel for manual stroke length adjustment. Mounted atop
the eccentric box, the handwheel can be adjusted at any point from (0 to 100%) stroke setting by
pressing down and then rotating as required. Stroke length is locked during operation to prevent
drift: pressing the handwheel down temporarily disengages the lock for adjustment; release after
adjustment automatically resets the lock at the new setting. An indicator adjacent to the
handwheel displays the output setting. Adjustments can be made while the pump is at rest or
operating, although adjustments are easier to make while the pump is in operation. Manual
adjustment serves as a backup for pumps provided with DLC/M controllers.
6.2 Priming the Reagent Head
1. Open the suction and discharge line shutoff valves.
2. If the piping system design and the storage tank are such that the product flows due to gravity
through the pump, reduce the discharge pressure and the system will self prime when the
pump is started. In the event the discharge line contains a significant amount of pressurized
air or other gas, it may be necessary to lower the discharge pressure to enable the pump to
self-prime.
3. If the installation involves a suction lift, it may be necessary to prime the reagent head and
suction line. Try priming the reagent head first. Refer to the Maintenance Section on Check
Valves. Remove the discharge valve assembly. Fill the head through the discharge valve
port with process (or compatible) liquid, and then reinstall the valve.
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